The Angel Aura Quartz crystal clusters have been electrically-cloaked in platinum which produces an iridescent sheen. The sheen is permanent. The molecules have bonded to the point where it is no longer a coating, but now part of the Angel Aura Quartz crystal.
Angel Aura is called color-enhanced, but this should not be confused with dyed crystals. A more proper term would be platinum-enhanced.
The combination of quartz and platinum is a powerful tool for clearing one's aura, multi-dimensional healing and freeing the body-mind of trauma.